Press.



W. KLOCKE 11. E. DOBSON.

PRESS. AFPI-.nunon rlLvzD ml. 12.1916. Patented 20ct 3, 1916;

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APPLICATION ULEB JAN'. IZ. 1916.

' Patented oat. 3,1916.A

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'UNITED sTATEs PATENT OFFICE.

WILLIAM lKLOCK AND JOHN E. DOBSON, OF NEW YORK, N. Y., ASSIGNORS TO E.W. BLISS COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION 0F WEST VIRGINIA.

PRESS.

Specification of Letters Patent.

Patented oct. 3, 1916.

Application led January 12, 1916. Serial No. 71,615.

United States of America, residing in the borough of Brooklyn, county ofKings, in the city and State of New .York, and in the borough ofManhattan, city, county, and

State Aof New York,respectively,have in! vented certain new and usefulImprovements in Presses, of which the following is a specification.

Thisinvention rela-tw tov al press of the type adapted for the heavierkindvof work wherein pressures of two thousand tons or more may beencountereohy The general type of press forming the subject matter ofthis application is disclosed in the Klocke Patent No. 1,108,187. In theconstruction ofpress illustrated in the said patent, the stationary bedAis located above the movable plunger and the latter is operated bycranks which push the plunger toward the bed in the working stroke ofthel punch. The base of the press and the bed are held together by ltierods, and it will be lperceived that the entire strain incident upon theoperation of thc'press comes upon the tie rods. This necessitates thatthe tie rods shall be of great strength and that the nuts andconnections between the tie rods and the parts to which they are Securedshall be likewise of great strength and solidity. Nothwithstanding this,the enormous strains encountered in the operation of the press in timewill stretch the tie rods.

The object of the present invention is to' lprovide a constructionwherein the tie rods shall be entirely relieved from all tensile strain,and' this result is accomplished by supporting the bed from the base ofthe press and causing cranks which are likewise operated from the baseof the press to draw the plunger toward the bed. Thereby all tensilestrain will be removed `from the tie rods and the only strain to whichthey will be subjected will be a compressive strain between the bedandthe base of the machine.

A desirable form in which our invention may be embodied is illustratedin the accompanying drawings, wherein Figure 1 is a side view, partly insection, of a press constructed according to our invention; Fig. 2 is anend View thereof from the left-hand end, Fig. l, partly broken, and

Fig. 3 a section on the line 3-8, Fig. l, looking 1n the direction ofthe arrow.

The press in connection with which we have illustrated our invention isprovided with a base or bottom A, a stationary bed B, and a movableplunger C. The stationary bed is supported on the base A by. stay rodsD, of which a suitable number may be provided.l The machine isillustrated as having four of such stay rods on each side of themachine. These stay rods pass through lugs b on the bed B, and have nutsZ threaded thereon, by which the bed is supported, and which areadjustable to permit the bed to be supported in the desired position,and which serve to resist the downward strain of the table B and totransfer to the stay rods D compressive strains between the base A andbed B. The upper ends Z1 of the tie rods D pass through holes in lugs con the plunger C, and serve to guide the plunger in its movements. Fig.3 illustrates a die block E upon the bed B,'and a punch F upon theplunger C, and the'punch in this ligure is illustrated as drawing thework G down into the die block.v

In the base A of the machine is mounted a crank shaft H having thereon a-crank I,

the connecting rod J of which is connectedl to the plunger C and tendsto draw the same down toward the bed in its operative movesuch knockoutsmay be employed, according to the length of the bed of the press. Eachis illustrated as mounted upon'a bar M hung by rods m, m1 from theplunger C. The rods m, m1 are threaded in the bar M and at their upperends have worm gears m2 which provide the desired adjustment for theknockouts through worms on the adjusting shaft N. Any otherknockoutdesired may be employed, as the invention is not concerned with thisfeature.

The crank shafts H aredriven from a driving shaft O having a pinion 0which meshes in gear l?1 on shaft P, upon which is a pinion p meshing ingear Q1 on shaft Q. This shaft has pinions g w'hich mesh in the crankshaft gears H1 on the crank shafts H. The main driving shaft Q extendsthroughout the length of the machine, and has thereon as many pinions Qas there are crank shafts to be-driven. This main driving shaft extendsdown through approximately the center of the base of the machine, andthe pinion g thereon each engage two crank shaft driving gears H1 onopposite sides of the machine.

The other crank shafts H, gears H1 and connecting rods J are similarlyconstructed to those described, and accordingly the same letters ofreference are used for the corresponding parts.

We have illustrated the most desirable form of constructing -ourinvention now known to us, but the same may be modified and equivalentdevices substituted for those illustrated, within the limits of the ap-lpended claims, without departing from the spirit ofthe invention.

We do not intend to be limited to -the precise construction of pressillustrated, nor to the precise number of parts.

What we claim is 1. In a power press for heavy work, a base, a movableplunger, and a stationary bed between said parts, stay rods connectingthe base and bed andforming guides forA guiding said plunger, a crankshaft mounted in the frame below said bed, and cranks thereon adapted todraw the plunger to its work. r

3. In a power press lfor heavy work, an upper movable plunger, a'stationary bed below said plunger, connections between the base ofthemachine and the bed, a crank shaft mounted in the base, and cranksthereon adapted to draw' the plunger to its work.

4. In a power press for heavy work, a base, an upper movable plunger anda stationary .bed below said plunger, rods attached to the base andsupporting s aid bed, and extending beyond said bed to provide guidesfor the plunger, crank shafts mounted in the base, and a plurality ofcranks thereon adapted to draw the plunger to its work. l

5. In' a power press for heavy work, a base, an upper movable plungerand a stationary bed below said plunger, rods attached to-the base andsupporting said bed, crank shafts mounted in the baseon each side of thepress, and a plurality of cranks on said shaft adapted to drawthe-plunger to its w'ork.

6l I'n a power press for heavy w'ork, a base, an upper movableplungerand a stationary bed below said plunger, rods attached to the base andsupporting said bed,

a crank shaft mounted .in the base and a plurality of cranks on saidshaft adapted to WILLIAM KLookia. l l JOHN E. DOBSON. Witnesses: l

FREDK. 0. FLADD, CHAs. J. ELLswoR'rH.

